From: "Guodeqing (A)"
Date: Fri, 24 Jul 2020 03:35:02 +
> The ihl check maybe not suitable in ip_fast_csum, the correct of the
> ihl value can be checked before calling the ip_fast_csum.
ip_fast_csum() must be able to handle any value that could fit in the
ihl field of the ip protocol header
> -邮件原件-
> 发件人: Eric Dumazet [mailto:eric.duma...@gmail.com]
> 发送时间: Friday, July 24, 2020 13:14
> 收件人: Guodeqing (A) ; Eric Dumazet
>
> 抄送: David Miller ; k...@kernel.org;
> mahe...@google.com; netdev@vger.kernel.org
> 主题: Re: 答复: [PATCH,v2] ipvlan: add the che
Please do not top-post on netdev / lkml (
https://www.mediawiki.org/wiki/Mailing_list_etiquette )
On 7/23/20 8:35 PM, Guodeqing (A) wrote:
> The ihl check maybe not suitable in ip_fast_csum, the correct of the ihl
> value can be checked before calling the ip_fast_csum.
>
> The implementation
The ihl check maybe not suitable in ip_fast_csum, the correct of the ihl value
can be checked before calling the ip_fast_csum.
The implementation of ip_fast_csum is different in different cpu architecture.
the IP packet will do ip forward in the ipvlan l3/l3s mode and the corrupted ip
packet
s
Because ipvlan will do the ip forward, it will do a route lookup.if the ihl of
the ip header is smaller than 5, this cause ip_fast_csum access the illegal
address.
-邮件原件-
发件人: Eric Dumazet [mailto:eduma...@google.com]
发送时间: Thursday, July 23, 2020 0:30
收件人: Guodeqing (A)
抄送: David Mill
I am sorry, the mail is not sent to you directly;
If do the following test,this will cause a panic in a arm64 VM. this can be
reproduced easily.
Linux osc 5.8.0-rc6+ #3 SMP Thu Jul 23 01:40:47 UTC 2020 aarch64
The programs included with the Debian GNU/Linux system are free software;
the exact
